Variable-stiffness shelling device for high-magnitude strong-impact test sabot
Through the design of the variable stiffness shelling device, the problem of the elastic support fragmentation in high-volume and strong impact test is solved, and the flexible separation between the elastic support and the test piece is achieved, which improves the test accuracy and result reliability.
Patent Information
- Application Number
- CN202422584121.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-10-25
AI Technical Summary
In the existing high-volume strong impact test, the bracket is prone to fragile when impacting the shelling device, resulting in changes in the posture and working conditions of the test piece, affecting the test results.
A variable stiffness dehulling device is adopted, including a gas discharge section, a dehuller shell, a piston and a mandrel combination. By buffering the impact force of the rehuller bracket, the rehuller is flexiblely separated from the specimen. The variable stiffness combination of the rehuller shell, the piston and a mandrel is used to replace the original rigid mandrel, and the gas pressure is adjusted to change the stiffness.
Avoid cracking and scratching of the test parts by the stent, improve the test accuracy, ensure the stable posture of the test parts, simple operation, reduce airflow impact, and improve the reliability of the test results.
Smart Images
Figure CN223229191U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of aviation structure strength testing, and in particular relates to a variable stiffness shell ejection device for high-value strong impact testing cartridge cases. Background Art
[0002] High-value strong impact tests involve strong impact and high-speed extreme impact. They are common in the field of aviation structural strength testing and are used to assess the strength of aviation structures. In existing high-value strong impact tests, the test piece is placed in a sabot. After being accelerated by a high-speed gas cannon system to the required speed for the test, the sabot impacts the discarding device and separates from the test piece. The test piece continues to fly at high speed to complete subsequent impact tests. Multiple tests have shown that when the test speed exceeds a certain value, the sabot instantly breaks apart upon impact with the discarding device. The fragments then scrape and impact the test piece, causing changes in the test piece's posture and test conditions, affecting the test results.
[0003] Therefore, it is desired to have a technical solution to overcome or at least alleviate at least one of the above-mentioned deficiencies of the prior art. Utility Model Content
[0004] The purpose of the present application is to provide a variable stiffness shell ejection device for a high-value strong impact test cartridge, so as to solve or alleviate at least one problem in the background technology.
[0005] The technical solution of the present application is: a variable stiffness shelling device for high-value strong impact test cartridges, comprising:
[0006] The bleed section installed in the test chamber and connected to the gun barrel;
[0007] A guide section connected to the waveform generator mounting fixture;
[0008] A shelling device housing is provided between the air release section and the guide section, wherein the shelling device housing has air inlet holes on its circumference for punching;
[0009] A mandrel is provided in the sheller housing, the mandrel having a flange, the flange of the mandrel being provided between the sheller housing and the guide section and being integrally connected to the sheller housing and the guide section, the flange of the mandrel being supported on the guide section, the mandrel having a tubular structure, and a gap being formed between the tubular structure of the mandrel and the sheller housing;
[0010] a piston disposed in the sheller housing and located in the gap, wherein a sealed cavity is formed between the piston, the sheller housing and the core shaft;
[0011] When the sabot containing the test piece passes through the deflation section and hits the piston, the piston compresses the gas between the shell casing, the piston and the core shaft to cushion the impact force of the sabot, while separating the sabot from the test piece. The test piece passes through the piston, the core shaft and the guide section in sequence and then hits the load generating material.
[0012] In an optional embodiment of the present application, a plurality of exhaust grooves are provided on the wall surface of the degassing section for discharging compressed gas during the flight of the sabot and for discharging gas in the barrel after the sabot impacts.
[0013] In an optional embodiment of the present application, a plurality of exhaust grooves are provided on the wall surface of the guide section for discharging compressed gas during the flight of the support.
[0014] In an optional embodiment of the present application, the air inlet is located on the rear side of the sheller housing.
[0015] In an optional embodiment of the present application, a hand valve is installed on the air inlet hole for introducing pressurized gas into the cavity and maintaining the pressure.
[0016] In an optional embodiment of the present application, a sealing ring is provided between the piston and the sheller housing and / or between the piston and the core shaft.
[0017] In an optional embodiment of the present application, the sheller housing, piston and core shaft are all made of high-strength metal materials.
[0018] In an optional embodiment of the present application, the piston is a stepped tubular structure, the smaller end of the stepped tubular structure is located at the front side and is limited by the sheller shell, the larger end of the stepped tubular structure is located at the rear side and can slide in the cavity, and the inner diameter of the smaller end is the same as the inner diameter of the core shaft.
[0019] The variable stiffness shelling device of the present application has the following advantages:
[0020] a) The original rigid mandrel decapping device is replaced by a variable stiffness combination of the shell, piston, and mandrel to prevent the sabot from breaking and scratching the test piece, greatly improving test accuracy;
[0021] b) The gas pressure between the shell, piston and mandrel of the extractor can be adjusted according to the impact speed of the sabot, so as to change the stiffness of the extractor and achieve better cushioning effect, ensuring that the sabot stays in the pressure relief section;
[0022] c) The combined variable stiffness shelling device is easy to operate and highly practical;
[0023] d) The pressure relief section is provided with an exhaust groove to release the pressure in the barrel in time, reducing the impact of the airflow on the sabot and preventing the sabot from entering the guide section. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the technical solutions provided by this application, the following is a brief introduction to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of this application.
[0025] Figure 1 This is a schematic diagram of the variable stiffness shelling device of the present application. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical solutions and advantages of the implementation of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below in conjunction with the drawings in the embodiments of this application.
[0027] In order to achieve flexible separation of the cartridge case and the test piece under high-speed impact, the present application provides a variable-rigidity shelling device for the cartridge case in high-value strong impact tests.
[0028] like Figure 1 As shown, the variable stiffness shelling device 10 for high-value strong impact test cartridge provided by the present application includes: a deflation section 1, a shelling device housing 2, a piston 3, a core shaft 4 and a guide section 5.
[0029] The degassing section 1 is installed in the decompression chamber, and its front end is connected to the gun barrel (not shown) for releasing the energy of the compressed gas. In some embodiments of the present application, a plurality of exhaust grooves are provided on the wall surface of the degassing section 1.
[0030] The end of the guide section 5 is connected to the waveform generator mounting fixture to ensure that the posture of the test piece does not change significantly before it hits the load generating material. In some embodiments of the present application, multiple exhaust grooves can also be provided on the wall surface of the guide section 5.
[0031] The sheller housing 2 is arranged between the air release section 1 and the guide section 5. An air inlet 21 is provided on the sheller housing 2, and a hand valve can be installed on the air inlet.
[0032] The core shaft 4 is arranged in the sheller housing 2 and has a flange. The flange of the core shaft 4 is arranged between the sheller housing 2 and the guide section 5. The three components can be connected in one piece by bolts. The flange of the core shaft 4 is supported on the guide section 5, and the core shaft 4 has a tubular structure. There is a certain gap between the outer surface of the tubular structure and the inner surface of the sheller housing 2.
[0033] The piston 3 is disposed in the sheller housing 2 and is located in the gap between the sheller housing 2 and the core shaft 4, thereby forming a closed cavity 22 between the sheller housing 2, the piston 3 and the core shaft 4. The piston 3 is a tubular structure, and when the sabot hits the piston 3 at high speed, flexible shelling is achieved.
[0034] In some embodiments of the present application, the air inlet 21 is located at the rear of the sheller housing 2, and a gas at a certain pressure can be introduced into the sealed cavity 22 through a hand valve and the pressure can be maintained.
[0035] In some embodiments of the present application, sealing rings may be provided between the piston 3 and the sheller housing 2 and between the piston 3 and the core shaft 4 to improve the buffering capacity.
[0036] In some embodiments of the present application, the sheller housing 2, piston 3, and core shaft 4 are all made of high-strength metal materials. On the one hand, this allows the sealed cavity 22 to withstand a certain pressure, and on the other hand, it can shell the sabot. For example, the metal material can be aluminum alloy or steel alloy.
[0037] In a preferred embodiment of the present application, the piston 3 is a stepped tubular structure, the smaller end of which is located at the front side and is limited by the sheller housing 2, and the larger end is located in the cavity 22 on the rear side and can slide in the cavity 22, and the inner diameter of the smaller end is the same as the inner diameter of the core shaft 4.
[0038] Before the test, bolts were used to sequentially connect the degassing section 1 to the barrel, the decapping shell 2 to the degassing section 1, the decapping shell 2 to the mandrel 4 and the guide section 5, and the guide section 5 to the waveform generator mounting fixture. A certain pressure of gas was introduced into the sealed chamber 22, with the piston 3 positioned at the far left end. The manual valve on the decapping shell 2 was closed. After the test began, the sabot containing the test piece was passed through the degassing section 1 at high speed, striking the piston 3. This impact caused the piston 3 to slowly move right, compressing the air in the chamber 22 between the decapping shell 2, the piston 3, and the mandrel 4. Simultaneously, the sabot separated from the test piece at the moment of impact. The test piece then passed through the piston 3, the mandrel 4, and the guide section 5, ultimately striking the load-generating material, completing the impact test.
[0039] During the above test, the piston 3 slowly moves to the right to compress the air in the cavity 22 between the sheller housing 2, the piston 3 and the core shaft 4, which can greatly alleviate the impact force of the cartridge case, prevent the cartridge case from breaking at the moment of impact and scratching the test piece, thereby affecting the posture of the test piece and the test conditions.
[0040] The variable stiffness shelling device of the present application has the following advantages:
[0041] a) The original rigid mandrel decapping device is replaced by a variable stiffness combination of the shell, piston, and mandrel to prevent the sabot from breaking and scratching the test piece, greatly improving test accuracy;
[0042] b) The gas pressure between the shell, piston and mandrel of the extractor can be adjusted according to the impact speed of the sabot, so as to change the stiffness of the extractor and achieve better cushioning effect, ensuring that the sabot stays in the pressure relief section;
[0043] c) The combined variable stiffness shelling device is simple and convenient to operate and has strong practicality.
[0044] d) The pressure relief section is equipped with an exhaust groove to promptly release the pressure in the barrel, reducing the impact of the airflow on the sabot and preventing the sabot from entering the guide section. This application has been successfully applied to high-value strong impact physical test systems and can also be applied to strong impact test equipment such as aviation and aerospace.
[0045] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.
Claims
1. A variable stiffness shelling device for high-value strong impact test cartridge, characterized in that: include: The bleed section installed in the test chamber and connected to the gun barrel; A guide section connected to the waveform generator mounting fixture; A shelling device housing is provided between the air release section and the guide section, wherein an air inlet hole is provided on the circumference of the wall of the shelling device housing for pressure charging; A mandrel is provided in the sheller housing, the mandrel having a flange, the flange of the mandrel being provided between the sheller housing and the guide section and being integrally connected to the sheller housing and the guide section, the flange of the mandrel being supported on the guide section, the mandrel having a tubular structure, and a gap being formed between the tubular structure of the mandrel and the sheller housing; a piston disposed in the sheller housing and located in the gap, wherein a sealed cavity is formed between the piston, the sheller housing and the core shaft; When the sabot containing the test piece passes through the deflation section and hits the piston, the piston compresses the gas between the shell casing, the piston and the core shaft to cushion the impact force of the sabot, while separating the sabot from the test piece. The test piece passes through the piston, the core shaft and the guide section in sequence and then hits the load generating material.
2. The variable stiffness shelling device for high-value strong impact test sabot according to claim 1, characterized in that: A plurality of exhaust grooves are provided on the circumference of the wall of the degassing section, which are used to discharge the compressed gas during the flight of the sabot and to discharge the gas in the gun barrel after the sabot impacts.
3. The variable stiffness shelling device for high-value strong impact test sabot according to claim 1, characterized in that: A plurality of exhaust slots are provided on the wall surface of the guide section for discharging compressed gas during the flight of the sabot.
4. The variable stiffness shelling device for high-value strong impact test sabot according to claim 1, characterized in that: The air inlet is located at the rear side of the sheller housing.
5. The variable stiffness shelling device for high-value strong impact test sabot according to claim 4, characterized in that: A hand valve is installed on the air inlet for introducing pressurized gas into the cavity and maintaining the pressure.
6. The variable stiffness shelling device for high-value strong impact test cartridge according to claim 1, characterized in that: A sealing ring is provided between the piston and the sheller housing and / or between the piston and the core shaft.
7. The variable stiffness shelling device for high-value strong impact test sabot according to claim 1, characterized in that: The sheller shell, piston and core shaft are all made of high-strength metal materials.
8. The variable stiffness shelling device for high-value strong impact test sabot according to claim 1, characterized in that: The piston is a stepped tubular structure, the smaller end of which is located at the front and is limited by the sheller housing, the larger end of which is located at the rear and can slide in the cavity, and the inner diameter of the smaller end is the same as the inner diameter of the core shaft.